Annual budget of benthic production in Mont Saint-Michel Bay considering cloudiness,microphytobenthos migration,and variability of respiration rates with tidal conditions |
| |
Authors: | A. Migné ,N. Spilmont,G. Boucher,L. Denis,C. Hubas,M.-A. Janquin,M. Rauch,D. Davoult |
| |
Affiliation: | 1. UPMC Univ Paris 6, UMR CNRS 7144 AD2M, Station Biologique de Roscoff, 29682 Roscoff Cedex, France;2. CNRS, UMR 7144 AD2M, Station Biologique de Roscoff, 29682 Roscoff Cedex, France;3. Univ Lille Nord de France;4. USTL, LOG, F-62930 Wimereux, France;5. CNRS, UMR 8187, F-62930 Wimereux, France;6. Museum National d’Histoire Naturelle DMPA, UMR CNRS 5178 BOME, Paris, France |
| |
Abstract: | In order to provide an accurate annual rate of net benthic community production, community photosynthetic response to incident irradiance and respiration were measured at different times of the year, at mid-tide level on the muddiest part of the Mont Saint-Michel Bay. As the water turbidity prevented any photosynthesis by the microphytobenthos during immersion periods, primary production was measured only during emersion periods. In contrast respiration was expected to vary according to the tidal cycle and was measured during both emersion and immersion periods. Primary production and respiration rates under emersion were assessed using in situ infra-red gas analysis of CO2 exchange measured in a benthic chamber. Respiration rates under immersion were assessed through total CO2 concentration variations in incubated cores. |
| |
Keywords: | Benthic environment Carbon budget Primary production Respiration Temporal variations Tidal flats France English Channel Mont Saint-Michel Bay |
本文献已被 ScienceDirect 等数据库收录! |
|